What is Cool Roof For buildings - Roofs, walls, containers, pipes, silos, cattle sheds, warehouses etc..For Slate, tiles, shingles, concrete, metal, steel: Any solid surface It is a cooling paint for exterior that can reduce outside temperatures up to 20 C or more while decreasing indoor temperatures by 3 5 C or more by employing a variety of additives and light-reflecting pigments, resulting in a very high solar reflectance performance High Solar reflectance Temperature reducing Energy Savings Water Soluble Very Low Volatile Organic Compounds (VOC's) Formaldehyde free Carcinogen free Prevents anti-aging and discoloration Prevents chalking Reduces Heat Island effect